// 响应头中间件
module.exports = async (ctx, next) => {
    const contentType = 'application/json;charset=utf-8'
    ctx.set('Content-Type', contentType)
    // ctx.response.body = '{"success":true}'
    ctx.set('Access-Control-Allow-Origin','*')
    ctx.set('Access-Control-Allow-Methods','OPTIONS,GET,PUT,POST,DELETE')
    await next()
}